36results about How to "Short desorption time" patented technology

The invention belongs to the field of adsorbers and particularly relates to a heating and vacuum desorption combined adsorber and an adsorption and desorption method and application. The adsorber adopts a vertical radial-flow adsorber structure, and heat exchange tubes are arranged vertically so as to make full use of the height space, reduce occupied area, enhance heat exchange and uniformity andimprove operation compatibility to a vacuumizing desorption mode. The adsorber realizes regeneration of an adsorption material in an indirect heating and vacuum desorption combined regeneration mode.The adsorber easily realizes fast heating and vacuum regeneration functions and has advantages of high heat exchange efficiency, small occupied area, short regeneration time of the adsorption material, high flow field uniformity and the like.

The invention discloses a dynamic desorption process for gold-loaded carbon, which comprises the following steps that: the gold-loaded carbon is in a loose suspension state when desorption solution flows by further to form a liquid-solid two-phase circulating fluidized bed; and in the dynamic desorption of the fluidized bed, when gold-loaded carbon particles at the axial central part of a desorption device overturn up and down, the gold-loaded carbon particles constantly move upwards under the action of the driving speed of the desorption solution, flow around and flow downwards along the circumferential wall of the desorption device when the gold-loaded carbon particles flow to the top, namely a highest interface of the fluidized bed due to the action of fluid resistance, are gathered into a central desorption solution inlet through the conical bottom when the gold-loaded carbon particles reach the bottom, flow upwards again to perform another cycle and repeat the process again and again to form the dynamic desorption of circulating fluidization. The process ensures that: the gold-loaded carbon particles perform various processes in a flow state; the whole desorption device is inan isothermal and uniform state compared with the conventional static desorption; and the mass transfer and heat transfer rates between the desorption solution and the carbon particles are large, which all strengthen the desorption chemical reaction process. The dynamic desorption of the gold-loaded carbon is more efficient than the static desorption, and desorption time is shortened.

The invention belongs to the technical field of separation and purification of effective components of plant leaves, and in particular relates to a method for separating and purifying plant leaf anthocyanins with mixed adsorption resins. The present invention mixes non-polar and medium-polar resins according to a certain mass ratio, and adjusts the hydrophobic force of the resin by regulating the content of different polar components in the resin skeleton, thereby weakening the adsorption force of the resin and anthocyanin, and at the same time Without affecting the adsorption capacity of the resin to impurities, a mixed macroporous resin filter body suitable for the separation and purification of plant leaf anthocyanins is finally formed.

The invention discloses a centrifugal type carbon tank desorption device and method for an exhaust gas turbine. By utilizing high-speed tail gas of an engine as power, a clutch and a speed reducer are mounted on a power transmission line; when active carbon adsorption capacity reaches the maximum saturation level, a carbon tank is driven by a transmission shaft to rotate, the adsorbed oil-gas is thrown out by centrifugal force; after oil-liquid is formed, the oil-liquid flows into an oil tank through an oil-liquid reflow pipe; when the carbon tank does not reach the saturation level, the active carbon is desorbed by launching pressure difference between the inner part of an air cylinder and the inner part of a combustion chamber, and the desorbed oil-gas flows into an air inlet pipeline of the engine by an oil-gas backflow pipe; and finally, the oil-gas is introduced into the combustion chamber to be used as fuel. By adopting two ways, the active carbon is desorbed, and energy of the tail gas is recycled; moreover, the desorption time is short, the efficiency is high, the desorption amount can be controlled, and liquid oil materials formed by the oil-gas can be recycled.

The invention relates to a method for preparing a graphene layer on the surface of a sensor substrate, comprising the following steps: using copper foil as a substrate, preparing and obtaining a graphene layer by chemical vapor deposition, and forming a supporting film on it; removing excess graphite ene and support film, remove the substrate; place the unsupported film side of the graphene layer on the surface of the sensor substrate, make the two contact and heat treatment so that the graphene layer is combined on the surface of the substrate; remove Described support film, and clean described graphene layer surface; Repeat above-mentioned steps, obtain another graphene layer with support film, and it is placed on the graphene layer on the sensor matrix surface that has been processed through above-mentioned steps; Again The supporting film is removed, and the two layers of graphene are bonded together through vacuum heat treatment. Implementing the method for preparing a graphene layer on the surface of a sensor substrate of the present invention has the following beneficial effects: the sensor has higher sensitivity and can desorb faster.

The invention discloses a method and device for desorption and recycling of titanium peroxide containing thallium. The method comprises the following steps: S1: adding titanium peroxide containing TL(I) into HNO3 solution, stirring and filtering to obtain primary precipitate S2: wash the initial precipitate, then react with concentrated sulfuric acid, and filter again to obtain the clear liquid and precipitate A; S3: mix the clear liquid with hydrogen peroxide, then drip ammonia water drop by drop, and collect the precipitate B; S4 : Precipitate A in S2 and Precipitate B in S3 are carried out multi-stage washing; S5: Precipitate A and Precipitate B are dry stored. Improve the recovery rate of titanium peroxide and enhance the effect of desorption cycle.

The invention discloses a method for detecting mycotoxin contamination in agricultural products, comprising: preparation, extraction, desorption, and detection of an adsorption phase; The method of adsorption and re-desorption reduces the deviation of the detection results due to the low content of the extracted mycotoxin or other impurities mixed in the sample when the mycotoxin content of the agricultural product sample is detected, and improves the detection accuracy. In addition, because the sample and the adsorption phase Compared with the existing operation of directly mixing the sample with the adsorption phase, the adsorption phase can be reused and the sample can be recovered. The desorption device is used for desorption operation, and the pressure of the evaporation and expansion of the desorption liquid is used to desorb the adsorbed on the adsorption phase. The mycotoxin is desorbed under pressure, which makes the desorption effect more complete than the existing atmospheric pressure heating soaking method, and uses less desorption liquid, which indirectly improves the subsequent detection accuracy.

The invention relates to a preparation method of a multi-layer hole active carbon membrane coating solid phase micro-extraction head. According to the technical scheme of the invention, the surface ofa stainless steel wire is covered with a polycarboxymethyl silane precursor of a multi-layer hole structure with a vapor assistance method, and stabilization, carbonization and chlorination reactionis performed to obtain the multi-layer hole active carbon membrane coating solid phase micro-extraction head. The preparation method provided by the invention is simple in process, does not cause environmental pollution and is suitable for large-scale industrial preparation. A multi-layer hole active carbon membrane coating has the characteristics of large specific surface area, high porosity andthe like, so that the extraction head is strong in enrichment capacity, large in extraction quantity, good in thermal stability, rapid in parsing speed and long in service life, has higher precision and accuracy and can rapidly determine the content of volatile organic compounds in air.